PMID: 2108727Apr 17, 1990Paper

Apolipoprotein A-I and apolipoprotein SAA half-lives during acute inflammation and amyloidogenesis

Biochimica Et Biophysica Acta
C Tape, Robert Kisilevsky

Abstract

The half-lives of two apolipoproteins of mouse high-density lipoproteins, apo A-I and apo SAA, were determined in normal animals and compared with those having an inflammatory condition, or inflammation leading to AA amyloid deposition. The apo A-I half-life was considerably shorter in animals with inflammation and in those that were preamyloidotic, than in controls (t1/2 of 3-3.5 h vs. 10-12 h). The average loss of apo A-I in controls over the first 10 h was 31.1 micrograms/ml per h, while that in inflamed animals was 58.7 micrograms/ml per h a 2-fold increase in apo A-I clearance. The apo SAA half-life was similar in all groups of animals and was of the order of 1.5 h. The concentration of apo SAA during inflammation is however considerably higher (500-1000-fold) than in controls, which implies a much greater clearance rate during inflammation and involving a process which is apparently not saturable. In addition to hypertriglyceridemia and Tangier's disease, ordinary acute inflammation can now be added to those pathological conditions which lead to a significant decrease in apo A-I half-life.

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